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Date:	Sat, 28 Jan 2017 12:27:48 -0800 (PST)
From:	Steven Penny <svnpenn AT gmail DOT com>
X-Google-Original-From:	Steven Penny
Subject:	Re: [ANNOUNCEMENT] Updated: bash-4.4.12-3
To:	cygwin AT cygwin DOT com
References:	<announce DOT 88ae2fe1-9528-9665-709e-93aad8d7e32c AT redhat DOT com>
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On Fri, 27 Jan 2017 13:23:53, "Eric Blake (cygwin)" wrote:
> A new release of bash, 4.4.12-3, has been uploaded and will soon reach a
> mirror near you.

Bash printf cannot handle any Unicode blocks starting with "Private Use Area"
(U+E000 - U+F8FF). Note I will be skipping the surrogate blocks[1] (U+D800 -
U+DFFF) for this post, as /bin/printf does not support them either[2]:

    $ bash -c 'printf \\uD7FF' | od -tcx1
    0000000 355 237 277
             ed  9f  bf

    $ bash -c 'printf \\uE000' | od -tcx1
    0000000 355 237 270 355 260 200
             ed  9f  b8  ed  b0  80

    $ /bin/printf '\uD7FF' | od -tcx1
    0000000 355 237 277
             ed  9f  bf

    $ /bin/printf '\uE000' | od -tcx1
    0000000 356 200 200
             ee  80  80

Tested with these environments:

    cygwin-20170119 bash-4.4.12
    cygwin-20170119 bash-4.4.11    
    cygwin-20170119 bash-4.4.5
    cygwin-20170119 bash-4.3.48
    cygwin-2.6.1 bash-4.4.12
    cygwin-2.6.1 bash-4.4.11
    cygwin-2.6.1 bash-4.4.5
    cygwin-2.6.1 bash-4.3.48
    cygwin-2.6.0 bash-4.4.12
    cygwin-2.6.0 bash-4.4.11
    cygwin-2.6.0 bash-4.4.5
    cygwin-2.6.0 bash-4.3.48

This appears to be Cygwin specific: I tested also on Debian 8.7.1 without issue.

[1] http://wikipedia.org/wiki/Universal_Character_Set_characters#Surrogates
[2] http://lists.gnu.org/archive/html/bug-coreutils/2008-05/msg00068


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